真っ当 (まっとう)proper; respectable; decent

真っ当, its kanji, and other words that share them.Open this graph

Kanji in 真っ当

写真しゃしんphotograph; photo
真相しんそうtruth; real situation
真のしんのtrue; real
真実しんじつtruth; reality
真ん中まんなかmiddle; centre
写真集しゃしんしゅうphoto book (esp. one featuring photos of female celebrities, models); photobook
真意しんいreal intention; true motive
真理しんりtruth
当初とうしょbeginning; start
当局とうきょくauthorities; relevant authorities
当時とうじat that time; in those days
当選とうせんbeing elected
当面とうめんcurrent; urgent
担当たんとうbeing in charge (of an area of responsibility); being responsible (for a work role, etc.)
本当ほんとうtruth; reality
当然とうぜんnatural; right

See how 真っ当 connects to the rest of Japanese.